Simply sends audio from Mic to the speaker output at realtime mic,
plug it into your computer or whatever using a 3.5mm male to male headphone jack and you get a free mic.
You can use it like

Live Microphone
Real-time Microphone
Microphone Stream
Live Audio Streaming
Real-time Audio Recorder
Live Sound Recorder
Microphone Streaming App
Audio Broadcasting
Live Recording App
Live Audio Recording
Live Sound Recording
Real-time Voice Recorder
Live Mic App
Microphone Broadcasting
Live Audio Streamer
Real-time Sound Recorder
Live Microphone Streamer
Audio Live Streaming
Live Audio Broadcasting
Real-time Audio Streaming

it Supports

Bluetooth Headset
Wired Headphone
Device built-in Mic
AUX Cable
Home Theater
Audio System

For uses like Singing or Announcement